It's not like ORWG.. you don't need to wait for it to dry and go tacky. Just smear some on your head.. Not too much.. just a thin later. Lay the piece down onto it the same as you would with a regular glue attachment though.
it'll be attached and ready for gentle styling straight away.. but give it an hour or two to really dry properly before having a stylist run comes and stuff through it.

removing is as simple as showering with shampoo. i love it!